Rockwell Automation 1756-RIO ControlLogix Remote I/O Communication Interface Module User Manual - Manual (Page 52)

52 Publication 1756-UM534B-EN-P - November 2010
Chapter 2 Configure Scanner Mode
ATTENTION
Unassigned, or unmapped, data (I/O addresses) are shown as
xxx in the I/O tree.
IMPORTANT
If you change mappings, make sure you clear the output table in
the ControlLogix controller to prevent inadvertently writing to
an incorrect I/O location. If you leave a value behind in the
output table, it now points to something else on the Remote I/O
network. To clear the output table, set the outputs to 0. You
must also re-import the aliases.
Unmapped Data
Mapped Data